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16 PLC/PLC Interface (DB 50 ... DB 53, DB 59)
05.91
16.3.1 General description
b) Conditional block call (processing time in inactive state approx. 0.008 ms)
t
c
7
7
7
7
1
2
2
4
5
6
7
t
D
t
c
9
8
1:
READ/WRITE
2 : DATA TRANSFER REQUESTED signal
3 : DATA TRANSFER BUSY signal
4 : DATA TRANSFER ASSIGNED signal
5 : DATA TRANSFER ENDED signal
6 : DATA TRANSFER EFFECTED place (to the accessed PLC)
7 : FB initiation of signal change
8 : User initiation of signal change
t
C
: PLC cycle time
t
D
: Internal interface assigned by data transfer
16–6
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Siemens AG 1991 All Rights Reserved 6ZB5 410-0HE02
SINUMERIK 880 (PJ)